重 点

essential

/ɪˈsenʃ(ə)l/
Something that is essential is extremely important or absolutely necessary to a particular subject, situation, or activity. 至关重要的

adjective [原级] 必不可少的,非常重要的;基本的,精髓的;(氨基酸、脂肪酸)必需的;(疾病)自发的,原发的

It was absolutely essential to separate crops from the areas that animals used as pasture. 将农作物与动物的放牧区域分离开来是绝对必要的。

noun [抽象名词] 必不可少的东西,必需品;要素,本质;(某学科的)基础,基本知识

Money is not essential to happiness. 金钱对于幸福并非必不可少。

后缀: al 【adjective】 表示具有某种性质的 - indicating pertaining to or characterized by 原词: essential 是通过后缀 【al】 构成的派生词
essential 出现在下面的课文中(提供视频、音频及笔记等可系统性学习)
Lesson 59 Collecting
Lesson 41 Training elephants
Lesson 46 Hobbies
ess(存在) + ential → 存在的东西 → 要素; 实质, 本质
单词造句: